343-line television system

[10][11] Earlier cameras used special spotlights or spinning disks to capture light from a single very brightly lit spot, and were not suitable for broadcasting of outdoor live events.

[1][2][3] Tests started the previous year from New York City (W2XF on the Empire State Building[4]), where NBC converted a radio studio in the Rockefeller Center for television use.

[13][14][15][16][17][18] The 343-line system was proposed for FCC approval by the Radio Manufacturers Association (RMA) in December 1937.

Technical details:[3][7][8] A a similar 343-line system was tested in the Soviet Union (Moscow) from 1937 onwards.

Regular operations were planned for the beginning of 1940, but work stopped due to the outbreak of World War II.

Iconoscope television cameras at NBC in 1937. Eddie Albert and Grace Brandt reprised their radio show, The Honeymooners-Grace and Eddie Show for television.